Machine for operating upon shoes



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MACHINE FOR OPERATING UPON SHOES E. w. STAG EY V ZWHMW Filed March 28, 1933 '17 Sheets-Shet 16 May W, 1936, E. W. STACEY MACHINE FOR OPERATING UPON SHOES Filed March 28, 1933 17 Sheets-Sheet 17 VE/V 70/1 I Patented May 19, 1936 PATENT OFFIQE MACHINE FOR OPERATING UPON SHOES Ernest W. Stacey, Beverly, Mass assignor to United Shoe Machinery Corporation, Paterson, N. 3., a corporation of New Jersey Application March 28, 1933', Serial No. 663,121

133 Claims.

This invention relates to machines for treating the lower peripheral portions of shoes. It is herein illustrated as embodied in a machine for applying cement to rubber-soled shoes of the tennis type around the foxing area, for example.

Large quantities of shoes of the tennis or sneaker type are manufactured at such a low cost that the rapid and uniform accomplishment of the various shoemaking operations is of great consequence. Substantially all these shoes are provided with rubber soles. These soles are cemented to the bottom of the shoe and are also secured around the periphery of the shoe by attachment to a foxing strip of unvulcanized rubber which is applied to the periphery of the shoe and is held there by an underlying coating of cement. It is necessary for the production of satisfactory work that the cement on the foxing area shall be applied in a coat of substantial thickness which should be substantially uniform and which must be so carefully located upon the shoe that the upper edge of the line of cement will coincide accurately with the position at which it is desired to place the upper edge of the foxing strip, thereby to secure firm attachment of the strip and avoid the application of cement in such a way that it will not be covered by the foxing strip. A satisfactory machine for carrying out this operation must be capable of producing work of the desired quality at a speed such that the time allowed for the operation is only a few seconds.

One important object of my invention is to provide an improved machine for operating upon the lower peripheral portions of shoes which will enable the shoes to be presented to the machine and withdrawn therefrom with facility, thus reducing the amount of idle time between successive cycles or operations of the machine and enabling increased production.

In the attainment of this object a feature of the invention resides in the provision, in a machine of the type which provides for relative movement between the shoe and an operating tool, of shoe-supporting mechanism having relatively movable clamping members designed to hold the shoe in a substantially upright position by engagement with the top of the shoe or its last, leaving the bottom of the shoe unobstructed for the action of the tool. In cementing, an excess of cement may be applied and the unused portion of the cement drained without damaging other parts of the shoe. This excess cement is caught and re-delivered to the tool. In the illustrated construction the tool is yieldingly mounted, at a substantially fixed position on the machine, and the shoe support or jack carries the shoe around to present successive portions of the periphery of the shoe to the tool.

In accordance with other features of the in vention and as illustrated, the shoe supporting jack is mounted on the lower end of a post, depending from the machine along a downwardly, forwardly inclined axis. Provision is made for moving the jack with both turning and straightline movements so as to impart to the periphery of the shoe a substantially constant linear velocity. The jack is made adjustable for different sizes of shoes and novel mechanism is provided to release the clamping mechanism of the jack in any position of the shoe. The invention also provides improved driving mechanism for the jack comprising, in the illustrated machine, a pinion in engagement with an internal, continuous rack. As shown also, this. rack is adjustable to take care of different sizes of shoes.

In order to make sure that the cement is applied around the whole periphery, for example, leaving no gap, the machine is arranged to carry the shoe through more than one complete peripheral movement, and is automatic, provision being made for a reverse movement to secure a uniform. starting position. In accordance with still other features of the invention, the machine is arranged automatically to bring the tool into contact with the shoe, to turn the shoe to act upon more than the full periphery, and then to withdraw the tool and at the same time to reverse the movement of the shoe to bring it back to the starting position. With the machine constructed thus, the operator grasps a shoe by the bottom with her right hand, lifts it up into engagement with the jack, depresses the starting treadle which allows the jack to grip the shoe, and. causes the machine to go through its cycle of operations. At the completion of this cycle, the above-mentioned reverse movement takes place which terminates at a predetermined position and the operator is thereby able, without ex- Li,

the shoe beyond that required to traverse the whole periphery once.

Still another object of the invention is to provide an improved construction of cement-applying tool by means of which a heavy and complete coating of cement may be applied regardless of the rapidity of movement of the shoe past the tool. To this end, and in accordance with still other features of the invention, the tool for applying cement to the foxing area of the shoe comprises a curved nozzle delivering a stream of cement across a very narrow gap directly upon the foXing area. This nozzle is guided for swinging movement about an axis which substantially coincides with the upper edge of the foxing area, when the tool is in operative relation to the shoe. I'he illustrated construction provides a supply pipe for the nozzle which is pivoted, at a point spaced from the nozzle, for rotation about the same axis as is the nozzle.

Preferably, and as shown, the tool is mounted upon an arm which is swingable to carry the tool toward and away from the shoe and heightwise of the shoe. This arm, in the illustrated machine, is controlled by a cam to draw it positively away from the shoe at the completion of the operation and to bring it forward into engagement with the shoe at the beginning of the operation. After the tool engages the shoe, the tool-carrying arm is released from control of the cam and is held yieldably in contact with the shoe.

To facilitate bringing the tool into engagement with the shoe at just the desired position and to control the tool when in contact with the shoe, there is provided a bottom rest inclined forwardly and downwardly with respect to the shoe bottom. A bottom-engaging member is also provided which contacts with spaced points upon the bottom of a shoe enabling the upper edge of the foxing area to be located as desired, such as along a straight line from the ball line rearwardly to the heel portion of the shoe.

In order that the bottom of the shoe may also be coated simultaneously with the foxing area, the illustrated machine is provided with an improved tool for directing a stream of cement upon the bottom of a shoe. Many tennis shoes are provided with a toe cap, usually of sheet rubber, which is cemented upon the toe of the shoe. To provide for this application of cement to the toecap area, the machine, as illustrated, includes also a novel tool for applying cement to this toe-cap area during the application of cement to other parts of the shoe. As shown, this tool comprises an applying nozzle delivering a curtain of cement into which the toe of the shoe moves during its progress past the foxing-cementing tool. At a predetermined point, depending upon the desired location of the rear edge of the toe-cap area, this tool is dropped into engagement with the shoe and is then dragged toward the toe end of the shoe and out of the range of movement of the shoe. This toe-cap cementing tool, in the illustrated machine, also embodies features of invention which may be included in the foxingcementing tool or the bottom-cementing tool to enable the production of a coating of uniform thickness. For this purpose the tool has adjacent to the nozzle a wick surrounded by a coil of wire. The wick is held away from the shoe a predetermined distance by the coil of wire and evens or levels the coating of cement applied by the nozzle to a thickness determined by the diameter of the wire around the wick.

Referring to the accompanying drawings,

Figure 1 is a side elevation of that portion of a machine, in which the present invention is embodied, lying above an arbitrary horizontal plane;

Fig. 2 is a vertical cross-section through a portion of the head of the machine;

Fig. 3 is a side elevation of the lower portion of the machine below the plane of Fig. 1 and completing that figure;

Fig. 4 is a side elevation of the jack showing a shoe in the position in which it is presented to the jack by the operator and held by him until the shoe is locked to the jack;

Fig. 5 is a longitudinal median up-and-down section through the jack and shoe in the same position as shown in Fig. 4;

Fig. 5 is a detail showing the manner in which the last-pin is mounted;

Fig. 6 is a cross-section taken on the line VI-VI of Fig. 1 looking down upon the jack and showing the jack in its initial position of rest;

Fig. '7 is a cross-section like that of Fig. 6 but showing the jack in another position;

Fig. 8 is a vertical cross-section through the jack on the line VIIIV1II of Fig. 5, together with a side elevation of the key which locks the adjustable toe member of the jack to the base of the jack;

Fig. 9 is a rear elevation of the machine;

Fig. 10 is a vertical cross-section through a multipart telescopic rod shown in Fig. 9, but on a larger scale;

Fig. 11 is a vertical section through the lower portion of the machine which is seen in Fig. 3,

XV-XV of Fig. 12 through the mechanism for controlling the overlap;

Fig. 16 is a detail showing how the hub of a shifting lever is fastened to the shaft;

Fig. 1'? is a vertical section on the line XVII-XVII of Fig. 3 through the same lever which is shown in Fig. 16 showing also a part of the mechanism for shifting the driving shaft longitudinally;

Fig. 18 is a side elevation with parts in section which shows the mechanism for actuating the shifting lever which moves the driving shaft longitudinally and which is partly shown, on a smaller scale, at the right of Fig. 3;

Fig. 19 is a view principally in end elevation of the controlling cams shown in side elevation in Fig. 18 and which cuts some parts on the line XIX-XIX of Fig. 18;

Fig. 20 is a vertical section through the same cams on the line XX--XX of Fig, 18;

Fig. 21 is a view in the direction of the arrow XXI in Fig. 1 looking down upon the cementalpplying mechanism and the catch-basin or drain board for cement which is located beneath it, and taken in a plane which is at forty-five degrees to the horizontal and hence is parallel to p the axis of the jack shaft;

Fig. 22 is a view in the direction of the arrow XXII in Fig. 1, and partly in section, looking down upon the cement-applying mechanism and its mounting;

Fig. 23 is a detail in side elevation on a greatly enlarged scale showing a part of the foxing cementing tool;

Fig. 24 is a side elevation of the foxing cementing tool and the segmental member in which it is mounted taken from the left of Fig. 22;

Fig. 24 is a detail in section showing the out let openings of the foxing cementing tool;

Fig. 25 is a plan, viewed from the under side and in the direction of the arrow XXV in Fig 3, of the cam and its associated mechanism which acts to swing the foxing cementing tool into contact with the shoe, to hold it in contact with the shoe during the cementing operation, and finally to withdraw it from the shoe at the end of that operation;

Fig. 26 is a vertical section from side to side of the cement-supply tank on the line XXVI-XXVI of Fig. l and showing the mechanism for forcing cement from the tank to the foxing cementing tool;

Fig. 27 is a section on the line XXVII-XXVII of Fig. 26 showing the stirrer in the cement-supply tank;

Fig. 28 is a section on the line XXVIIL-XXVIII of Fig. 26 showing the cement pump;

Fig. 29 is a section on the line XXIXXXIX of Fig. 26 showing a part of the connection of the pump shaft with its driving shaft;

Fig. 30 is a section on the line XXX-XXX of Fig. 26 showing the same connection;

Fig. 31 is a detail principally in section of the relief valve in the cement-supply line;

Fig. 32 is a section on the line XXXII-XXXII of Fig. 31;

Figs. 33 to 36, inclusive, show the shoe in various positions which it occupies during the cementing operation;

flow of cement to the shoe;

Fig. 39 is a view partly in section and partly in elevation showing more particularly the construction of the toe cap cementing tool;

Fig. 40 is a view looking down upon the toe cap cementing tool and the structure by which it is carried;

Fig. 41 is a cross-section through the jack supporting post, and normal thereto, looking down upon a portion of the jack and a portion of the mechanism for moving the toe cap cementing tool into place over the toe portion of the shoe;

Fig 42 is a section through a portion of the toe cap cementing mechanism taken in a plane parallel to the plane of Fig. 40 and showing the parts as they appear when the toe cap cementing tool is in its withdrawn, inoperative position;

Fig 43 is a vertical section on the line XLIII-XLIII of Fig. 42 through the arm or yoke which carries the toe cap cementing tool, the parts being in the same positions shown in Fig. 42;

Fig. 44 is an elevation, from the front of the machine, of an alternative form of shoe bottom rest provided with means for applying cement to the bottom of a shoe which is shown in process of being operated upon;

Fig. 45 is an end elevation, from the left, of the mechanism and a section of the shoe shown in Fig. 44;

Fig. 46 is a view looking down upon the mechanism shown in Fig. 44, the shoe being removed; and

Fig. 47 is a section through a portion of the bottom rest mechanism showing more particularly the compartment from which cement is forced out against the bottom of the shoe.

Referring first to Figures 1 and 3 which, when placed one above the other, show the whole machine in side elevation, the machine comprises a base or frame A in which most of the driving mechanism is contained, an adjustable carrier B for the cement-applying mechanism, and a head C bolted to the base. Mounted in the head C is a shoe support or jack D in which the shoe is held and which is moved to present the foxing area of the shoe to the cement-applying tool of the cement-applying mechanism. The shoe its is held with its heightwise axis inclined at about 45 to the vertical since it has been found that this position permits the operator to present and remove the shoe from the jack wi h he least effort. The carrier B is adjustable along similarly inclined guideways formed on the base to provide for shoes of different heights, the adjustment of the carrier being made by turning W0 long, heavy screws. one of which is shown at 5% in Fig. 1, said screws being held from longitudinal movement and being threaded into the carrier B. The supporting member or base plate of the carrier B is shown in Fig. 25 together with the manner in which it is held on the inclined guideway formed on the base A. The cement-applying tool is mounted for yielding movement toward and from the shoe, for movement heightwise of the shoe and for rocking movement, so as to follow the contour of the foxing area as the shoe is moved past it; and the jack is actuated in such a manner as to cause the foxing area of the shoe to travel past the cement-applying tool. In the position of rest of the parts of the machine, as shown in Figs. 1 and 3, the shoe-holding parts of the jack are in unlocked position ready to receive the shoe, and the cement-applying tool is in its withdrawn inoperative position. In the use of the machine, the operator presents a shoe to the jack in the position of the shoe Hit) of Fig. 1, holds it in that position and steps upon a treadle whereupon the following movements take place. The shoe is locked rigidly to the jack, the cement-applying tool is moved into contact with the shoe, and the jack begins what will be termed its forward movement. The forward movement of the jack causes the foxing area of the shoe to be traversed by the cement-applying tool from the point at which the tool first contacts with the shoe around the shoe and back to a point a little beyond the starting point so that the ends of the coating of cement will overlap somewhat. The cementapplying operation is now complete, but the parts must be returned to their initial positions. To this end, the cement-applying tccl is withdrawn from the shoe, and the movement of the jack is reversed. During this partial backward movement of the jack the shoe is returned to its in itial position where it stops, and the shoe is unlocked. Thus the operator has only to present a shoe to the jack and to depress the treadle whereupon the shoe is locked in place on the jack, clemented, returned to initial position, unlocked and brought to rest; and inasmuch as the initial position of the jack and the extent of its travel are always the same for any given adjustment of the parts of the machine for a given size of shoe, all shoes are operated upon in exactly the same manner. There is also provided, as has been ex- 

